It appears as though the southern belle reunited with her estranged husband, Josh McKee, after enduring a cheating scandal, and fans were quick to assume they wasted no time getting pregnant again after seeing this Instagram photo.
"So pregnant," one user wrote.
"Baby No. 4?" another asked.
A third chimed in with, "I see a belly!"
Mackenzie, however, was far from amused by this banter and almost immediately hit back at such speculation.
"This photo was taken last night. I'm at my smallest weight, and for sure not pregnant. I hope I never tell someone who is not pregnant they are pregnant," she wrote in the comments section.
The blonde beauty also shared via Snapchat back in October that she had her tubes tied after giving birth to the couple's third child, Broncs.
In Touch reported back in January that the couple was living separately after Josh allegedly caught her texting with a married man.
“When I came home [from giving birth to Broncs in August] I had postpartum depression. That pushed Josh away. There was no support. He hated who I became," she explained. “During that time he had left and that was when I was texting that guy.”
“I never wanted to be with that guy or talked about being with him. He’s in a serious relationship and that is not who I am,” she continued, adding there was "no flirting or affair.”
However, Mackenzie also accused her longtime love of degrading her in her time of need.
“He said, ‘I don’t love you, you’re crazy,’” she recalled. “I was suicidal. He said, ‘Go kill yourself, but don’t do it in front of me and the kids.’”
Aside from Broncs, the couple also shares a son, Gannon, and daughter, Jaxie.
Scroll through the gallery to see their cutest family moments!